Power transmitting apparatus



March 19, 1940.

H. A. ROHRICH El AL POWER TRANSMITTING APPARATUS Filed Feb. 25, 1938 3 Sheets-Sheet 1 IN V EN TORS. HA.Pobrdch By C-A. Nielsen ATTO YS.

Mardl 19, 1940.

H. A. ROHRICH ET AL POWER TRANSMITTING APPARATUS 3 Sheets-Sheet 2 Filed Feb. 25, 1938 INVENTORS. HA.R0h2 'ic]7 C .Ajifa'els en BY M 7 ATTO March 19, 1940. H. A; ROHRICH EFAL POWER TRANSMITTING APPARATUS Filed Feb. 25, 1938 s Sheets-Sheet 3 INVENTORS. Robrich A. Nzelsen BY M AT NEYS.

Patented Mar. 19, 1940 POWER TRAN SIVIITTING APPARATUS Harold A. Rohrich and Carl A. Nielsen, Alton, 111., assignors'to Owens-Illinois ,Glass Company, a

corporation of Ohio Application February 25, 1938, Serial No. 192,492

2Claims. (o1.1s3..-i72).

The improved power transmitting apparatus comprising the present invention is primarily adapted for use in transmitting rotary motion to bottle forming machines of the Owens type,

:although the principles of the invention are ap: plicable to other machines and the apparatus may, if desired, be employed for transmitting motion to other relatively heavy duty machinery. I Heretofore in transmitting rotary motion to such bottle forming machines, the drive has been efiected from a variable speed direct current motor through a suitable gear reduction mechanism directly to the driving gear of the machine with the result that when the circuit to the motor was 15 interrupted, either for the purpose of shutting down the machine or for the purpose of stopping the machine temporarily due to an emergency, the angular momentum of the relatively heavy machine has been assimilated by the motor and speed 20*transmission unit. This overrunning of the machine has resulted in placing an undue strain on the motor and on the gearing connected thereto while at the same time cessation of the operation of the machine has not been sufficiently abrupt to 25 satisfy emergency requirements. Furthermore, the use of a direct current motor has resulted in fluctuations in the speed of machine operation, thereby causing variations in the operating characteristics of the machine.

30 The principal object of the invention is to provide a power transmitting apparatus which will obviate the above mentioned difficulties by providing a more uniform drive for the machine at any selected speed of rotation thereof, while at the 35 same time, provision is made for independently braking both the momentum of the machine itself and of the motor by means of which the machine is driven, the braking mechanisms automatically coming into operation when the supply of current 40 to the driving motor is interrupted.

Another object of the invention is to provide a power transmitting apparatus of the type set forth above which affords a convenient and efficient power take-off or timing gear take-off for independently driving various auxiliary machine equipment such as a bottle take-out device, bottle uprighter, leer loader or other machine adjunct in synchronism with the rotary movement of the forming machine.

50 Other objects and advantages of the invention not at this time enumerated will become apparent as the description ensues.- I

In the accompanying drawings in which one embodiment of the invention is shown:

a Fig. 1 is an end elevational view of the power transmitting apparatus showing the same operatively connected to a rotary bottle forming machine of the Owens type.

Fig. -2 is 'a fragmentary end elevational view (partly in section) of the apparatus taken in the 5 opposite direction from the disclosure of Fig. 1, and

Fig.3 isa diagrammatic view of the apparatus showingthe electrical connections therefor.

The apparatus is shown connected to a rotary bottle forming machine I3, including conventional forming molds m and involves in its general organization, a stationary framework including supporting legs I0 between which there is supported a lower table II. by means of bolts I2 to a stationary part of the bottle forming machine I3.

Asupportingiplate I4 extends across the upper ends of the legs I8 and is secured thereto by means of .bolts I5. The prime mover for the bottle forming machine I 3 is in the form of a three-phase alternating current motor M having a motor shaft I6 which is connected through a conventional variable speed transmission mechanism' I'Lto the driven shaft I8 thereof (Fig. 3). The gear ratio between the motor shaft I6 and the driven shaft I8 maybe varied by means of a hand wheel I9 which is associated with a controllerv box 20 mounted on the forming machine platform 2I and which includes'a connecting rod 2 I extending between the controller box and the transmission mechanism IT. This is standard equipment obtainable in the open market.

The shaft I8 .(Figs. '1 and 2) has mounted thereon a pinion 22 which meshes with a relatively large gear 23 mounted on a horizontal shaft 24. The shaft 24 carriesa bevel pinion 25 (Figs. 1 and 3) which meshes with a larger bevel gear 26 mounted ona vertical shaft 21, the latter being journalled in bearings, one of which is shown at 28, and which is mounted on the stationary framework of the forming machine. The vertical shaft 21 carries a pinion 29 at its upper end which meshes with. the main driving gear 30 of the bottle forming machine.

The large gear 23meshes with a pinion 3I mounted on one end of a combined brake and jack shaft 32 which is journalled in bearings 33 which are secured by bolts 34 to the table I I.

From the above description of gearing, it will be seen-that the brake shaft 32 is geared by a positive train of gearing i. e., through the gears 3|, 23, shaft '24, bevel gears 25, 26, shaft 21, and gears 29 30', directly to the bottle machine I3.

In order to assimilate the angular momentum The legs I0 are secured 15 which cooperates with a pair of brake shoes 31 which are pivotally secured to 'a-pair of. brakearms 38. The lower ends of the brake arms 38 are pivoted in a support 41' secured to the table H. The upper ends of the arms 38 are adjust-' ably connected together by a rod 39 and actuating lever 40 therefor, the outer end of which .lever has a pin and slot connection 4| to a link 42 which is in turn connected to the core 43 of a solenoid 44.. The solenoid 44 is mounted on a.

bracket 45 which is supported .onzthe lower. 1

table II.

A coil spring46 surrounding the rod 39 serves to normally maintain the rod 39 and lever 49 in position to draw the brake arms 38 inwardly and,

apply a braking torque to the brake shaft '32.,.

Energization of the solenoid 44 in a manner presently to be described, extends. the core 43 thereof. ;to cause movement of therod 39 and lever 40 so as to expand the. brake arms 38 and release the braking torque normally applied .to the brake shaft 32 by'the action of the spring 46.

In order that the angular momentum of the electric motor M shall not be assimilated in the train of gearingconnecting the motor shaft 1| 6 to the brake shaft 32 when the supplyof current to the motor is interrupted, means is provided for applying a braking torque directly to the;

motor shaft. Toward this end a second braking mechanism 50, similar in every. respect .tothe braking mechanism..35,. asregards its general structure and operation, isassociatedwith the.

motor shaft l6 and includes an actuating sole-; noid 5|.

to the supporting plate [4.

Referring now to Fig.3 wherein the electrical, connections for the motorM and the two braking- ;mechanisms 35 and 50 are illustrated diagram-.-

matically, the three-phase motor .M is :provided with the usual lead-in wires a, b and c .which are connected through a three-pole switchg54 withv a source of current (not shown). The windings ,of the solenoid 44 are connected by wires d ande to the lead-in Wires 1) and 0 while the windings. of they solenoid 51. are similarly connected by wires and g to the lead-in wires 1) and a. Thus it will be seen that when the switch 54 is closed, both solenoids 44 and 5| are energized and the.

respective braking mechanisms 35 and .50 there-- for are maintained in inoperative relation to the brake shaft 32 and motor shaft Iii-with which' When the .switch 54 is opened, the supply of current to the they are respectively associated.

solenoids 44 and 5| and the-motor M is interrupted. Thus the solenoids 44 and 5| are deenergized and the respective spring actuated braking q mechanisms 35 and 50 are actuated in'the. manner previously described to apply a braking torque to the brake shaft 32 and motor shaft I6 V respectively.

If it is desired to operate anyauxiliaryequipment for the bottle forming gmachinesuch as take-out. mechanism, leer loading mechanism;

This braking mechanism. in the main; is supported on a bracket 52 secured as. at 53 bottle uprighting mechanism, etc., a sprocket gear 60 mounted on the brake shaft 32 may serve either as a power take-off or as a timing gear take-off for independently driven synchronizing mechanism as desired. Accordingly, the controlling motor (H of a synchronous motor combination is shown as being connected by means of chain 63 to the power take-off sprocket gear 60.

Modifications may be resorted to within the spirit of the appended claims:

We claim:

1. Power transmitting apparatus comprising a drive shaft adapted to drive mechanism having a high moment of inertia; means for applying a torque to the drive shaft including an electric motor having a motor shaft, a driven shaft, a gear reduction device. connecting the motor shaft and driven shaft whereby the latter is driven at a reduced speed from the motor a relatively small pin-ion 'onthe driven shaft, and a relatively large gear. on the drive shaft meshing with the pinion; amechanical. braking mechanism for, applying a brakingtorque to the motor shaft; spring means normally rendering said braking mechanism operative; a brake shaft; a relatively small pinion onthe brake. shaft. meshing with the relatively a:high,moment;of inertia; means for applying a torque .to the drive shaft including an electric motorhaving a motor shaft, a driven shaft, a.

gearreduction device connecting the motor shaft and .driven shaft whereby the latter is driven at areducedspeed from the motor, a pinion onthe driven shaft, and a gear on the drive shaft, meshing with the pinion; a mechanical braking.

mechanism for applying a braking torque. to the motor shaft movable from operative to inoperative 'positions and vice versa; a solenoid opera:

tively connected to the braking. mechanism and adapted.when-energized to move the same to one .of said positions;v spring means normally tendingto move the braking mechanism to its other position; a brake shaft; a pinion on thebrake shaft meshing with the. gear on theldrive shaft; a second mechanical braking mechanism independent of the. first braking mechanismfor applying a braking. torque to the brake shaft and likewisev ,movablefrom operative to inoperative positions and vice versa;. a solenoid .operatively connected to the second braking mechanism, and.

adapted when energized to move the same 11030118 ofsaid latter positions; spring means normally.

tending to move the latter braking mechanism ,to

the other of said latter positions; means electrically connecting the motor and solenoids to a.

source of ,-current, and a switch common to the motorand both solenoids for interrupting the supply of current thereto..

HAROLD AVROHRICHL CARL A. .NIELSEN. 

